Examine source code of CFbooster

{
  "manifest_version": 2,
  "name": "CFbooster",
  "version": "0.2.0",
  "author": "itdevwu",
  "description": "An extension that boost page speed of Codeforces in China.",
  "homepage_url": "https://blog.itdevwu.com/cfbooster/",
  "icons": {
    "96": "icons/favicon-96x96.png"
  },
  "browser_action": {
    "default_icon": "icons/favicon-96x96.png",
    "default_title": "CFbooster",
    "default_popup": "popup/cfbooster_main.html"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "boost_gstatic.js",
      "blocklist.js",
      "boost_sta.js",
      "boost_googleapis.js",
      "boost_mathjax.js"
    ]
  }
}